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Centrifugal microfluidic device for the high-throughput synthesis of Pd@AuPt core-shell nanoparticles to evaluate the performance of hydrogen peroxide generation.
Lab on a Chip ( IF 6.1 ) Pub Date : 2020-07-13 , DOI: 10.1039/d0lc00461h Hau Van Nguyen 1 , Ki Yoon Kim , Hyobin Nam , Seung Yong Lee , Taekyung Yu , Tae Seok Seo
Lab on a Chip ( IF 6.1 ) Pub Date : 2020-07-13 , DOI: 10.1039/d0lc00461h Hau Van Nguyen 1 , Ki Yoon Kim , Hyobin Nam , Seung Yong Lee , Taekyung Yu , Tae Seok Seo
Affiliation
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We propose a novel high-throughput screening platform using a centrifugal microfluidic device for producing combinatorial tri-metallic catalysts. The centrifugal device was designed to perform 60 reactions under different conditions on a single device. As a model to search for an optimal tri-metallic catalyst, we synthesized a variety of Pd@AuPt nanoparticles (NPs), in which Pd nanocubes served as a core, and Au and Pt atoms formed a shell. The centrifugal microfluidic device was etched on the top and bottom sides, in which two zigzag-shaped microchannels were patterned on the top side, and 60 reaction chambers were fabricated on the bottom side. Through the sophisticated zigzag-shaped microchannels, Pt2+ ion and Pd nanocube solutions were injected into the channel in one shot, and the centrifugal force equally and automatically divided the injected solutions into 60 aliquots during the rotation. By controlling the sophisticated channel dimensions and designing the passive valve structure, the Pt2+ ion, Pd nanocube, and Au3+ solutions were loaded into the reaction chamber in sequential order depending on the programmed rotational direction and speed. Therefore, the ratio of Au to Pt to synthesize Pd@AuPt core–shell NPs was changed from 0.028 : 1 to 12 : 1, and accordingly, the resultant 60 types of Pd@AuPt catalysts presented with different ratios of metal atom compositions. Then, we screened the catalytic activity of the Pd@AuPt NPs for generating H2O2 according to the degree of coating of Au and Pt, and the Pd@AuPt catalyst with the Au/Pt ratio at 0.5 turned out to be the most effective.
中文翻译：
离心微流控装置，用于高通量合成Pd @ AuPt核壳纳米粒子，以评估过氧化氢生成的性能。
我们提出了一种新颖的高通量筛选平台，该平台使用离心微流控装置生产组合三金属催化剂。离心设备设计为在单个设备上可以在不同条件下进行60个反应。作为寻找最佳三金属催化剂的模型，我们合成了多种Pd @ AuPt纳米颗粒（NPs），其中Pd纳米立方体为核，Au和Pt原子形成壳。在顶侧和底侧蚀刻离心微流体装置，其中在顶侧上构图两个锯齿形的微通道，并且在底侧上制造60个反应室。通过复杂的锯齿形微通道，Pt 2+将离子和Pd纳米立方体溶液一次性注入通道中，离心力在旋转过程中将注射的溶液均等地自动分成60等份。通过控制复杂的通道尺寸并设计被动阀结构，根据编程的旋转方向和速度，将Pt 2+离子，Pd纳米立方体和Au 3+溶液按顺序添加到反应室中。因此，Au与Pt合成Pd @ AuPt核-壳NP的比例从0.028：1变为12：1，因此，所得的60种Pd @ AuPt催化剂呈现出不同的金属原子组成比。然后，我们筛选了Pd @ AuPt NPs产生H 2 O的催化活性。根据Au和Pt的涂覆程度，将图2中的Au / Pt比率为0.5的Pd @ AuPt催化剂最有效。
更新日期：2020-09-15
中文翻译：
离心微流控装置，用于高通量合成Pd @ AuPt核壳纳米粒子，以评估过氧化氢生成的性能。
我们提出了一种新颖的高通量筛选平台，该平台使用离心微流控装置生产组合三金属催化剂。离心设备设计为在单个设备上可以在不同条件下进行60个反应。作为寻找最佳三金属催化剂的模型，我们合成了多种Pd @ AuPt纳米颗粒（NPs），其中Pd纳米立方体为核，Au和Pt原子形成壳。在顶侧和底侧蚀刻离心微流体装置，其中在顶侧上构图两个锯齿形的微通道，并且在底侧上制造60个反应室。通过复杂的锯齿形微通道，Pt 2+将离子和Pd纳米立方体溶液一次性注入通道中，离心力在旋转过程中将注射的溶液均等地自动分成60等份。通过控制复杂的通道尺寸并设计被动阀结构，根据编程的旋转方向和速度，将Pt 2+离子，Pd纳米立方体和Au 3+溶液按顺序添加到反应室中。因此，Au与Pt合成Pd @ AuPt核-壳NP的比例从0.028：1变为12：1，因此，所得的60种Pd @ AuPt催化剂呈现出不同的金属原子组成比。然后，我们筛选了Pd @ AuPt NPs产生H 2 O的催化活性。根据Au和Pt的涂覆程度，将图2中的Au / Pt比率为0.5的Pd @ AuPt催化剂最有效。
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